Lime Microsystems LMS7002MR3 - TBB(1, 2) Configuration Memory

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2.11 TBB(1, 2) Configuration Memory
The block diagrams of TBB1 and TBB2 modules are shown in Figure 11 and Figure 12
respectively. The tables in this chapter describe the control registers of TBB1 and TBB2
modules.
Table 12: TBB(1, 2) configuration memory
Address (15 bits)
Bits
Description
0x0105
15
14 – 12
11 – 5
4
3
2
1
0
STATPULSE_TBB_(1, 2): This is a narrow start-up pulse of more than 1us width.
Default: 0
LOOPB_TBB_(1, 2)[2:0]: This controls which signal is connected to the loopback
output pins loopb as follows:
Bits [1:0]:
0 – output is disconnected (high impedance) loop back is disabled.
(default)
1 – DAC current output is routed to the loopb pins.
2 – low band ladder output is routed to the output.
3 – main TBB output is routed to the loopb outputs.
Bit [2] (swaps the I Q channels):
0 TBB output I goes to loopb_2 path and Q goes to loopb_1 path.
(default)
1 – TBB output I goes to loopb_1 path and Q goes to loopb_2 path.
Note: when both the lowpass ladder and real pole are powered down, the output of
the active highband biquad is routed to the loopb outputs on setting 3.
Reserved
PD_LPFH_TBB_(1, 2): This selectively powers down the LPFH_TBB biquad.
Please note, the LPFH_TBB is powered down if any of the following is true:
PD_LPFLAB_TBB=0 & PD_LPFS5_TBB=0, or,
PD_TBB = 1, or PD_LPFH_TBB = 1.
0 – Active (default)
1 – powered down
PD_LPFIAMP_TBB_(1, 2): This selectively powers down the LPFIAMP_TBB front-
end current amp of the transmitter base band.
Please note, the LPFIAMP_TBB is powered down if any of the following is true:
PD_TBB = 1, or PD_LPFIAMP_TBB = 1
0 – Active (default)
1 – powered down
PD_LPFLAD_TBB_(1, 2): This selectively powers down the LPFLAD_TBB low pass
ladder filter of the transmitter base band.
Please note, the ladder is powered down if any of the following is true:
PD_TBB = 1, or PD_LPFLAD_TBB = 1
0 – Active
1 – powered down (default)
PD_LPFS5_TBB_(1, 2): This selectively powers down the LPFS5_TBB low pass
real-pole filter of the transmitter base band.
Please note, the real-pole stage is powered down if any of the following is true:
PD_TBB = 1, or PD_LPFS5_TBB = 1
0 – Active
1 – powered down (default)
EN_G_TBB_(1, 2): Enable control for all the TBB_TOP power downs
0 – All TBB_TOP modules powered down
1 – All TBB_TOP modules may be selectively turned off (default)
Default: 00000000 00000111